JP6135311B2 - Musical sound generating apparatus, musical sound generating method and program - Google Patents

Description

  The present invention relates to a musical sound generating device, a musical sound generating method, and a program.

  2. Description of the Related Art Conventionally, there is known an input control device that extracts the pitch of an input waveform signal and instructs the pronunciation of a musical sound corresponding to the extracted pitch. As this type of device, for example, in Patent Document 1, a waveform zero-cross period immediately after detection of a maximum value of an input waveform signal and a waveform zero-cross period immediately after detection of a minimum value are detected, and the detection is performed when both periods substantially coincide. Instructing the tone of a musical tone with a pitch corresponding to the period, or detecting the maximum value detection period and the minimum value detection period of the input waveform signal, and if both periods are substantially the same, the pitch of the pitch corresponding to the detected period A technique for instructing the pronunciation of a musical tone is disclosed.

JP-A-63-136088

  However, in the conventional method, vibration of the string is detected by arranging a dedicated sensor corresponding to each string called a hexa pickup. Such a hex pickup is expensive, and since it is installed on the main body, bonding and moat processing are performed, resulting in the influence of vibration on the body (main body), which causes deterioration of the raw sound. It was. Furthermore, since vibration is taken only at one point in the longitudinal direction of the main body, which is the direction in which the strings are stretched, detection of overtones and the like is insufficient, and the live sound is simplified and the sound is not good.

  The present invention has been made in view of such circumstances. Since the pitch designation and vibration detection are performed by a sensor arranged on the fingerboard, a hexa-pickup is unnecessary and raw vibration can be captured with high sound quality. An object is to provide a musical sound generator.

In order to achieve the above object, a musical sound generator according to one aspect of the present invention is provided.
A plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to a string to be pressed, and outputting a signal corresponding to the detected degree of proximity;
An operation position detecting means for detecting a position on the fingerboard of a sensor having the largest degree of proximity among the plurality of sensors as a string pressing operation position;
Vibration for extracting vibration signals of each of the plurality of stretched strings from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge side from the detected string pressing position. Signal extraction means;
A string detecting means for detecting whether any of the plurality of strings stretched is struck based on the extracted vibration signal;
A pitch determination means for determining a pitch of a musical tone to be generated from the detected operation state in response to detection of the string;
Sound generation instruction means for instructing the sound source to generate the musical tone having the determined pitch;
Have

  According to the present invention, since the pitch designation and the vibration detection are performed by the sensor arranged on the fingerboard, a musical tone generator that does not require a hexa-pickup and can capture raw vibration with high sound quality can be provided.

It is a front view which shows the external appearance of the electronic stringed instrument of this invention. It is a block diagram which shows the hardware constitutions of the electronic part which comprises an electronic stringed instrument. It is a schematic diagram which shows the signal control part of a string-pressing sensor. It is a perspective view of a neck to which a string-pressing sensor of a type that detects string pressing without detecting contact between a string and a fret based on an output of an electrostatic sensor is applied. It is a flowchart which shows the main flow performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the switch process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the timbre switch process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the performance detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the string pressing position detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the advance trigger process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the precedence trigger availability process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the string vibration process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the normal trigger process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the pitch extraction process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the mute detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the integration process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the parameter change process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the raw sound process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the Wave taking-in process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the modification of the Wave taking-in process performed in the electronic stringed instrument which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Outline of electronic stringed instrument 1]
First, an outline of an electronic stringed musical instrument 1 as an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a front view showing an external appearance of the electronic stringed instrument 1. As shown in FIG. 1, the electronic stringed instrument 1 is roughly divided into a main body 10, a neck 20, and a head 30.

  A bobbin 31 on which one end of a steel string 22 is wound is attached to the head 30, and the neck 20 has a plurality of frets 23 embedded in a fingerboard 21. In the present embodiment, six strings 22 and 21 frets 23 are provided. Each of the six strings 22 is associated with a string number. The thinnest string 22 is the string number “1”, and the string number increases in the order of increasing the thickness of the string 22. The 21 frets 23 are respectively associated with the fret numbers. The fret 23 closest to the head 30 has the fret number “1”, and the fret number of the arranged fret 23 increases as the distance from the head 30 side increases.

The main body 10 includes a bridge 16 to which the other end of the string 22 is attached, a normal pickup 11 that detects vibration of the string 22, a tremolo arm 17 for adding a tremolo effect to the emitted sound, An electronic unit 13 incorporated in the inside, a cable 14 for connecting each string 22 and the electronic unit 13, and a display unit 15 for displaying the type of timbre and the like are provided.
In the electronic stringed instrument 1, the pitch of each string 22 increases as the place where the string is pressed moves to the bridge side due to the structure. That is, the higher the fret number, the higher the pitch.
In the electronic stringed musical instrument 1 of this embodiment configured as described above, an output value (hereinafter referred to as a sensor value) from a string-pressing sensor 44 described later is used without using a hex pickup that independently detects the vibration of each string 22. ), The vibration of each string 22 is detected independently.
Specifically, in the electronic stringed musical instrument 1 of the present embodiment, one sensor value among the detected sensor values is used for pitch specification, and the other sensor value detected is a sensor that detects string vibration. Use as That is, when the pitch is determined with a predetermined sensor value, vibration detection for pitch reflection and sound generation trigger is performed with another sensor value. When the sensor value is detected again (when the string position is changed), the pitch is determined based on the detected sensor value again, and the pitch is changed by following the string vibration with another sensor value. .

FIG. 2 is a block diagram illustrating a hardware configuration of the electronic unit 13. The electronic unit 13 includes a CPU (Central Processing Unit) 41, a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, a string sensor 44, a sound source 45, a normal pickup 11, a switch 48, The display unit 15 and an I / F (interface) 49 are connected via a bus 50.
Further, the electronic unit 13 includes a DSP (Digital Signal Processor) 46 and a D / A (digital analog converter) 47.

  The CPU 41 executes various processes according to a program recorded in the ROM 42 or a program loaded into the RAM 43 from a storage unit (not shown).

  The RAM 43 appropriately stores data necessary for the CPU 41 to execute various processes.

  The string-pressing sensor 44 detects what number-of-frets of what-numbered strings are pressed. The string-pushing sensor 44 detects whether a string-pushing operation has been performed on the string 22 (see FIG. 1) on any fret 23 (see FIG. 1) based on an output of an electrostatic sensor described later.

  The sound source 45 generates, for example, waveform data of a musical tone whose sound is instructed by MIDI (Musical Instrument Digital Interface) data, and an audio signal obtained by D / A conversion of the waveform data via the DSP 46 and D / A 47. Are output to the external sound source 53 to issue instructions for sound generation and mute. The external sound source 53 amplifies an audio signal output from the D / A 47 and outputs it, and a speaker (not shown) that emits a musical sound using the audio signal input from the amplifier circuit. And). The sound source 45 outputs an audio signal obtained by D / A converting Wave (RIFF wave form Audio Format) data generated based on the sensor value acquired from the string-pressing sensor 44 to the external sound source 53 to generate a raw sound. put out.

  The normal pickup 11 converts the detected vibration of the string 22 (see FIG. 1) into an electrical signal and outputs it to the CPU 41.

The switch 48 outputs input signals from various switches (not shown) provided on the main body 10 (see FIG. 1) to the CPU 41.
The display unit 15 displays the type of timbre to be sounded and the like.

  FIG. 3 is a schematic diagram illustrating a signal control unit of the string-pressing sensor 44.

  In the string-pressing sensor 44, the Y signal control unit 52 sequentially designates one of the strings 22 and designates an electrostatic sensor corresponding to the designated string. The X signal control unit 51 designates one of the frets 23 and designates an electrostatic sensor corresponding to the designated fret. In this way, only the electrostatic sensor designated at the same time for both the string 22 and the fret 23 is operated, and the change in the output value of the operated electrostatic sensor is output to the CPU 41 (see FIG. 2) as the string pressing position information.

  FIG. 4 is a perspective view of the neck 20 to which a string-pressing sensor 44 of a type that detects string pressing without detecting contact between the string 22 and the fret 23 based on the output of the electrostatic sensor is shown.

  In FIG. 4, an electrostatic pad 26 as an electrostatic sensor is disposed below the fingerboard 21 in association with each string 22 and each fret 23. That is, 144 electrostatic pads are arranged in the case of 6 strings × 21 frets as in this embodiment. These electrostatic pads 26 detect the electrostatic capacity when the string 22 approaches the fingerboard 21 and transmit it to the CPU 41. The CPU 41 detects the string 22 and the fret 23 corresponding to the pressed position based on the transmitted capacitance value.

[Main flow]
FIG. 5 is a flowchart showing a main flow executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S1, the CPU 41 executes initialization by turning on the power. In step S2, the CPU 41 executes switch processing (described later in FIG. 6). In step S3, the CPU 41 executes performance detection processing (described later in FIG. 8). In step S4, the CPU 41 executes a raw sound process (described later in FIG. 18). In step S5, the CPU 41 executes other processing. In other processing, the CPU 41 executes processing such as displaying the code name of the output code on the display unit 15, for example. When the process of step S5 ends, the CPU 41 shifts the process to step S2 and repeats the processes of steps S2 to S5.

[Switch processing]
FIG. 6 is a flowchart showing a switch process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S11, the CPU 41 executes timbre switch processing (described later in FIG. 7). In step S12, the CPU 41 executes mode switch processing. In the mode switch process, the CPU 41 determines a mode for identifying which one of the parameter change processes (described later in FIG. 17) is executed. When the process of step S12 ends, the CPU 41 ends the switch process.

[Tone switch processing]
FIG. 7 is a flowchart showing a timbre switch process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S21, the CPU 41 determines whether or not a timbre switch (not shown) is turned on. If it is determined that the timbre switch is turned on, the CPU 41 proceeds to step S22, and if it is not determined that the timbre switch is turned on, the CPU 41 ends the timbre switch. In step S22, the CPU 41 stores the timbre number corresponding to the timbre specified by the timbre switch in the variable TONE. In step S <b> 23, the CPU 41 supplies an event based on the variable TONE to the sound source 45. As a result, the tone color to be pronounced is designated for the sound source 45. When the process of step S23 ends, the CPU 41 ends the timbre switch process.

[Performance detection processing]
FIG. 8 is a flowchart showing a performance detection process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S31, the CPU 41 executes a pressed string position detection process (described later in FIG. 9). In step S32, the CPU 41 executes string vibration processing (described later in FIG. 12). In step S33, the CPU 41 executes integration processing (described later in FIG. 16). When the process of step S33 ends, the CPU 41 ends the performance detection process.

[Pushing position detection processing]
FIG. 9 is a flowchart showing a string-pressing position detection process (the process in step S31 in FIG. 8) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S41, the CPU 41 sequentially searches the sensor values of the electrostatic sensors 46 belonging to the 1st to 6th strings (each string). In step S <b> 42, the CPU 41 acquires the line number (M) where the maximum sensor value is detected as the output value of the string-pressing sensor 44. In step S43, the CPU 41 acquires the line number (N) at which the next largest sensor value is detected as the output value of the string-pressing sensor 44. In step S44, the CPU 41 determines whether or not a pressing position has been detected. The determination that the pressing position has been detected is performed as follows. The CPU 41 detects the pitch corresponding to the fret to which the line number at the position where the pitch is high (position on the bridge side) among the acquired line numbers (M) and (N) as the pressing position. If it is determined that the pressing position has been detected, the CPU 41 moves the process to step S46. If it is not determined that the pressing position has been detected, the CPU 41 determines in step S45 that the pressed string is an open string. . Thereafter, the CPU 41 shifts the processing to step S46.
In step S46, the CPU 41 executes a preceding trigger process (described later in FIG. 10). In step S47, the CPU 41 records the output value of the string-pressing sensor 44 at the preceding trigger timing in the RAM 43. Here, the output value of the string-pressing sensor 44 at the preceding trigger timing is recorded in association with each pressing position as Snm. Here, n = string number and m = fret number.
In step S48, the CPU 41 creates pitch correction data. Specifically, assuming that the pitch corresponding to the string number and the fret number is the reference pitch, and the output value of the string sensor 44 when the reference pitch is generated is Knm, the pitch correction data ( Ph) is calculated by the following equation (1) using the correction value (H).
Ph = (Knm−Snm) / 100 × H (1)
Here, since Snm changes according to the actual pressing force, the pitch correction data changes according to the pressed state.
In step S49, the CPU 41 determines whether or not a full string search has been performed. If it is determined that the entire string search has not been performed, the CPU 41 returns the process to step S41. If it is determined that the entire string search has been performed, the CPU 41 ends the pressed string position detection process.

[Advance trigger processing]
FIG. 10 is a flowchart showing the preceding trigger process (the process in step S46 in FIG. 9) executed in the electronic stringed instrument 1 according to the present embodiment. Here, the preceding trigger is a trigger for sound generation at the timing when the player presses the string before the string.

First, in step S51, the CPU 41 executes a wave capture process (described later in FIG. 19). In step S52, the CPU 41 executes a preceding trigger availability process (described later in FIG. 11). In step S53, it is determined whether or not a preceding trigger is possible, that is, whether or not a preceding trigger flag is on. The preceding trigger flag is turned on in step S62 of the preceding trigger availability process described later. When the preceding trigger flag is on, the CPU 41 shifts the process to step S54, and when the preceding trigger flag is off, the CPU 41 ends the preceding trigger process.
In step S54, the CPU 41 transmits a sound generation instruction signal to the sound source 45 based on the timbre specified by the timbre switch and the velocity determined in step S63 of the preceding trigger availability process. When the process of step S54 ends, the CPU 41 ends the preceding trigger process.

[Precedence trigger availability processing]
FIG. 11 is a flowchart showing the preceding trigger availability process (the process in step S52 in FIG. 10) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S61, the CPU 41 determines whether or not the vibration level of each string based on the Wave value calculated in step S141 of FIG. 19 is greater than a predetermined threshold (Th1). If this determination is YES, the CPU 41 shifts the processing to step S62, and if NO, the CPU 41 ends the preceding trigger availability processing.
In step S62, the CPU 41 turns on the preceding trigger flag in order to enable the preceding trigger. In step S63, the CPU 41 executes a velocity determination process.
Specifically, in the velocity determination process, the following process is executed. The CPU 41 calculates the acceleration of the change in the vibration level based on the sampling data of the three vibration levels before the time when the vibration level based on the output of the hex pickup exceeds Th1 (hereinafter referred to as “Th1 time”). To detect. Specifically, the first speed of the vibration level change is calculated based on sampling data one and two times before the Th1 time point. Further, the second speed of the vibration level change is calculated based on the sampling data two and three times before the Th1 time point. And based on the said 1st speed and the said 2nd speed, the acceleration of the change of a vibration level is detected. Further, the CPU 41 interpolates so that the velocity falls within the range of 0 to 127 in the dynamics of the acceleration obtained in the experiment.
Specifically, when the velocity is “VEL”, the detected acceleration is “K”, the acceleration dynamics obtained in the experiment is “D”, and the correction value is “H”, the velocity is expressed by the following formula (2 ).
VEL = (K / D) × 128 × H (2)
Map (not shown) data indicating the relationship between the acceleration K and the correction value H is stored in the ROM 42 for each pitch of each string. When observing the waveform of a certain pitch of a certain string, the change in the waveform immediately after the string is removed from the pick has an inherent characteristic. Therefore, the correction value H is acquired based on the detected acceleration K by storing map data of this characteristic in the ROM 42 in advance for each pitch of each string. When the process of step S63 ends, the CPU 41 ends the preceding trigger availability process.

[String vibration processing]
FIG. 12 is a flowchart showing a string vibration process (the process in step S32 in FIG. 8) executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S71, the CPU 41 executes a wave capture process (described later in FIG. 19). In step S72, the CPU 41 executes normal trigger processing (described later in FIG. 13). In step S73, the CPU 41 executes pitch extraction processing (described later in FIG. 14). In step S74, the CPU 41 executes a mute detection process (described later in FIG. 15). When the process of step S74 ends, the CPU 41 ends the string vibration process.

[Normal trigger processing]
FIG. 13 is a flowchart showing a normal trigger process (the process of step S72 of FIG. 12) executed in the electronic stringed instrument 1 according to the present embodiment. The normal trigger is a sound generation trigger at the timing when a string is detected by the performer.

  First, in step S81, the CPU 41 determines whether or not a preceding trigger is possible. That is, the CPU 41 determines whether or not the preceding trigger flag is off. If it is determined that the preceding trigger is not possible, the CPU 41 shifts the process to step S82. When it is determined that the preceding trigger is possible, the CPU 41 ends the normal trigger process. In step S82, the CPU 41 determines whether or not the vibration level of each string based on the Wave value calculated in step S141 of FIG. 19 is greater than a predetermined threshold (Th2). If this determination is YES, the CPU 41 shifts the process to step S83, and if NO, the CPU 41 ends the normal trigger process. In step S83, the CPU 41 turns on the normal trigger flag in order to enable the normal trigger. When the process of step S83 ends, the CPU 41 ends the normal trigger process.

[Pitch extraction processing]
FIG. 14 is a flowchart showing a pitch extraction process (the process of step S73 in FIG. 12) executed in the electronic stringed instrument 1 according to this embodiment.

  In step S91, the CPU 41 executes a wave capture process (described later in FIG. 19). In step S92, a pitch is extracted from the wave value acquired by the wave acquisition process of step S91, and a pitch is determined.

[Mute detection processing]
FIG. 15 is a flowchart showing a mute detection process (the process of step S74 in FIG. 12) executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S101, the CPU 41 determines whether or not sound is being generated. If this determination is YES, the CPU 41 shifts the process to step S102, and if this determination is NO, the CPU 41 ends the mute detection process. In step S102, the CPU 41 determines whether or not the vibration level of each string based on the Wave value calculated in step S141 in FIG. 19 is smaller than a predetermined threshold (Th3). If this determination is YES, the CPU 41 shifts the process to step S103, and if NO, the CPU 41 ends the mute detection process. In step S103, the CPU 41 turns on the mute flag. When the process of step S103 ends, the CPU 41 ends the mute detection process.

[Integration processing]
FIG. 16 is a flowchart showing an integration process (the process in step S33 in FIG. 8) executed in the electronic stringed musical instrument 1 according to the present embodiment. In the integration process, the result of the pressed string position detection process (the process of step S31 in FIG. 8) and the result of the string vibration process (the process of step S32 in FIG. 8) are integrated.

First, in step S111, the CPU 41 determines whether or not the preceding pronunciation has been completed. That is, it is determined whether or not a sound generation instruction has been given to the sound source 45 in the preceding trigger process (see FIG. 10). In the preceding trigger process, when it is determined that a sound generation instruction has been given to the sound source 45, the CPU 41 shifts the process to step S112. In step S112, the CPU 41 executes a parameter change process (described later in FIG. 17), and shifts the process to step S115.
On the other hand, if it is not determined in step S111 that the sound source 45 has been instructed to generate sound in the preceding trigger process, the CPU 41 shifts the process to step S113. In step S113, the CPU 41 determines whether or not the normal trigger flag is on. If the normal trigger flag is on, the CPU 41 transmits a sound generation instruction signal to the sound source 45 in step S114, and the process proceeds to step S115. In step S113, when the normal trigger flag is off, the CPU 41 shifts the processing to step S115.
In step S115, the CPU 41 determines whether or not the mute flag is on. If the mute flag is on, the CPU 41 transmits a mute instruction signal to the sound source 45 in step S116. When the mute flag is off, the CPU 41 ends the integration process. When the process of step S116 ends, the CPU 41 ends the integration process.

[Parameter change processing]
FIG. 17 is a flowchart showing the parameter changing process (the process in step S112 in FIG. 16) executed in the electronic stringed musical instrument 1 according to this embodiment.

  First, in step S121, the CPU 41 reads the pitch (Pt) extracted in step S92 of FIG. In step S122, the CPU 41 calculates a sound source control pitch (Opt) for controlling the sound source 45 by multiplying the read pitch (Pt) by the pitch correction data (Ph) calculated in step S46 of FIG. To do. In step S <b> 123, the CPU 41 transmits the sound source control pitch calculated to the sound source 45 to reflect the sound source control pitch (Opt) in the sound source 45. Therefore, the pitch can be corrected according to the pressed state.

[Raw sound processing]
FIG. 18 is a flowchart showing the raw sound processing executed in the electronic stringed instrument 1 according to this embodiment.

  In step S131, the CPU 41 executes a wave capturing process (described later in FIG. 19). In step S132, the sound captured by the wave capturing process in step S131 is D / A converted and output as a raw waveform. In other words, the CPU 41 transmits the sound captured by the D / A converted Wave capture process to the sound source 45 as a sound generation instruction signal. When the process of step S132 ends, the CPU 41 ends the live sound process. In the present embodiment, since the electrostatic pad 26 is used as means for detecting string vibration, the raw sound is reproduced based on the sensor value of an electrostatic sensor other than the pressed electrostatic sensor.

[Wave import processing]
FIG. 19 is a flowchart showing a wave capturing process executed in the electronic stringed instrument according to the present embodiment.

In step S141, the CPU 41 calculates, as a Wave value, a value obtained by adding and averaging all sensor values of other electrostatic pads having a pitch higher than that of the electrostatic pad whose pitch is determined. That is, the wave value of the string is expressed by the following equation (1).
Wave value of string = ΣO _{Po, o} / number of other electrostatic pads whose pitch is higher than that of the electrostatic pad whose pitch is determined (1)
“ΣO _{Po, o} ” indicates the sum of the other detected sensor values.
When the process of step S141 ends, the CPU 41 ends the wave capture process.
In the electronic stringed instrument 1, the wave value of the string is calculated by such a method, so that the sound is detected only by the electrostatic sensor used for detecting the pressed string without using the mechanism for detecting the vibration of each string such as the hexapickup. Perform high specification and vibration detection. In the case of this method, a pickup that supports the string at a single point reproduces the sound with a beautiful expression close to that of an actual performance in order to generate output sound using values from multiple sensors compared to the case of night. can do.

[Wave loading process (modified example)]
FIG. 20 is a flowchart showing a modified example of the wave capturing process executed in the electronic stringed instrument according to the present embodiment. Note that the process of step S151 is a process that shows another method instead of the process of step S141 of FIG. 19 described above.

In step S151, the CPU 41 calculates a sensor value indicating the maximum value among the sensor values of the electrostatic sensor having a higher pitch than the electrostatic sensor for which the pitch is determined as the Wave value. That is, the wave value of the string is expressed by the following equation (2).
Wave value of string = _OPmax
“ _OPmax ” indicates a sensor value indicating the maximum value among the sensor values of the electrostatic sensor having a higher pitch than the electrostatic sensor for which the pitch is determined.
In the electronic stringed instrument 1, when calculating the wave value of a string by such a method, the resistance to noise is better than when calculating the wave value from the above-described average.

Heretofore, the configuration and processing of the electronic stringed instrument 1 of the present embodiment have been described.
In the present embodiment, the plurality of electrostatic pads 26 are provided on the fingerboard 21 on which the plurality of strings 22 are stretched, and each of the electrostatic pads 26 detects the degree of proximity to the string 22 to be pressed and detected. A signal corresponding to the proximity degree is output. The CPU 41 detects the position on the fingerboard 21 of the electrostatic pad 26 having the greatest degree of proximity among the plurality of electrostatic pads 26 as a stringing operation position, and the fingerboard on the bridge 16 side from the detected stringing operation position. The vibration signal of each of the plurality of strings 22 stretched is extracted from at least a part of the output signal of each of the plurality of electrostatic pads 26 provided in 21, and is stretched based on the extracted vibration signal. It is detected whether or not any of the plurality of strings is played, and in response to the detection of the string, the pitch of the musical sound to be generated is determined from the detected operation state. The sound source 45 is instructed to generate a tone having the determined pitch.
Therefore, since the pitch designation and the vibration detection are performed by the sensor arranged on the fingerboard 21, the hexa-pickup is unnecessary, the raw vibration can be captured with high sound quality, and a subtle change in timbre or pitch can be reflected. it can.

Further, in the present embodiment, the CPU 41 extracts the vibration pitch from the vibration signal of the string 22 from which the string is detected, and based on the extracted pitch, calculates the pitch of the musical sound produced by the sound source 45. Control.
Therefore, since the pitch designation and vibration detection are performed by the sensor arranged on the fingerboard, the hexa pickup is not required.

Further, in the present embodiment, the CPU 41 stretches a signal obtained by weighted averaging the output signals of the plurality of electrostatic pads 26 provided on the fingerboard 21 on the bridge 16 side from the detected string pressing position. It is extracted as a vibration signal for each of a plurality of strings.
Therefore, since the pitch designation and vibration detection are performed by the electrostatic pad 26 arranged on the fingerboard 21, the hexa-pickup is not required.

Moreover, in this embodiment, CPU41 is based on the signal of the maximum level in the output signal of the several electrostatic pad 26 provided in the fingerboard 21 in the bridge | bridging 16 side from the detected string pressing position. It is extracted as a vibration signal for each of the plurality of strings 22 stretched.
Therefore, since the pitch designation and vibration detection are performed by the electrostatic pad 26 arranged on the fingerboard 21, the hexa-pickup is not required.

  In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

  In the above-described embodiment, since an example of a configuration excluding the hexa-pickup is shown with the same configuration as that of the 22-fret electronic string instrument of the type in which the existing electrostatic pad detects only the pressed string, it is configured as a 21-fret electronic string instrument. Not limited to this. When configured as a 22-fret electronic string instrument, it can be configured by further adding an electrostatic pad for detecting fret and string vibration. Further, more frets can be added by the same method. Further, in order to achieve high sound quality, the electrostatic pad may be arranged at a point where no frets are installed.

  Further, in the above-described embodiment, the string vibration is detected using the sensor value of the electrostatic pad other than the electrostatic pad used for determining the pitch, but the electrostatic pad used for determining the pitch is used. String vibration may be detected including the sensor value. In addition, the sensor value of the electrostatic pad having a high pitch is used for the electrostatic pad used for determining the pitch, but the electrostatic pads located on both sides of the electrostatic pad used for determining the pitch are used. Sensor values may be used. In this case, since a reverberation component such as an aliquot string (resonance string) is included, an effect of overtone and reverberation is generated, resulting in a rich sound.

  Further, as described in the above-described embodiment, the Wave value used for detecting the vibration of the string may be used for generating a raw sound, and may be used not only for the pitch but also for other effects and sound source control. Good.

  In the above-described embodiment, the musical sound generator to which the present invention is applied has been described by taking the electronic stringed instrument 1 as an example. However, the present invention is not particularly limited thereto, and can be configured as an electronic musical instrument without strings.

  The series of processes described above can be executed by hardware or can be executed by software.

When a series of processing is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium.
The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is configured by a recording medium provided to the user in a state of being incorporated in advance in the apparatus main body and distributed separately from the apparatus main body in order to provide the user with the program. The recording medium is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disk is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disk), or the like. The magneto-optical disk is configured by an MD (Mini-Disk) or the like. Moreover, the recording medium provided to the user in a state of being preliminarily incorporated in the apparatus main body is constituted by, for example, a hard disk included in the RAM 43 of FIG. 2 in which a program is recorded.

  In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in time series along the order, but is not necessarily performed in time series, either in parallel or individually. The process to be executed is also included.

  As mentioned above, although embodiment of this invention was described, embodiment is only an illustration and does not limit the technical scope of this invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the gist of the present invention. These embodiments and modifications thereof are included in the scope and gist of the invention described in this specification and the like, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
A plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to a string to be pressed, and outputting a signal corresponding to the detected degree of proximity;
An operation position detecting means for detecting a position on the fingerboard of a sensor having the largest degree of proximity among the plurality of sensors as a string pressing operation position;
Vibration for extracting vibration signals of each of the plurality of stretched strings from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge side from the detected string pressing position. Signal extraction means;
A string detecting means for detecting whether any of the plurality of strings stretched is struck based on the extracted vibration signal;
A pitch determination means for determining a pitch of a musical tone to be generated from the detected operation state in response to detection of the string;
Sound generation instruction means for instructing the sound source to generate the musical tone having the determined pitch;
A musical sound generator.
[Appendix 2]
Pitch extraction means for extracting a vibration pitch from a vibration signal of the string detected by the string;
Musical sound control means for controlling the pitch of a musical sound that is generated by the sound source based on the extracted pitch;
The musical tone generator according to appendix 1, further comprising:
[Appendix 3]
The vibration signal extraction unit is configured to weight-average signals output from the plurality of sensors provided in the fingerboard on the bridge portion side from the detected string pressing position, and the plurality of tensioned signals. 3. The musical tone generator according to appendix 1 or 2 that is extracted as a vibration signal of each string.
[Appendix 4]
The vibration signal extraction means is stretched based on a signal of a maximum level among output signals of the plurality of sensors provided in the fingerboard on the bridge portion side from the detected string pressing position. 3. The musical tone generator according to appendix 1 or 2 that extracts the vibration signals of a plurality of strings.
[Appendix 5]
A musical tone generator having a plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to each of the strings to be pressed, and outputting a signal corresponding to the detected degree of proximity A musical sound generation method used for
Detecting the position on the fingerboard of the sensor having the greatest degree of proximity among the plurality of sensors as a string pressing operation position;
Extracting a vibration signal of each of the plurality of strings stretched from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge portion side from the detected string pressing position,
Based on the extracted vibration signal, it is detected whether any of the plurality of stretched strings is struck,
In response to the detection of the string, the pitch of the musical sound to be generated is determined from the detected operation state,
A musical sound generating method for instructing a sound source to generate a musical sound having the determined pitch.
[Appendix 6]
A musical tone generator having a plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to each of the strings to be pressed, and outputting a signal corresponding to the detected degree of proximity As a computer used as
An operation position detection step of detecting a position on the fingerboard of a sensor having the greatest degree of proximity among the plurality of sensors as a string pressing operation position;
Vibration for extracting vibration signals of each of the plurality of stretched strings from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge side from the detected string pressing position. A signal extraction step;
A string detection step for detecting whether one of the plurality of strings stretched is stringed based on the extracted vibration signal;
A pitch determination step for determining a pitch of a musical tone to be generated from the detected operation state in response to the detection of the string;
A sound generation instruction step for instructing a sound source to generate a sound of the determined pitch;
A program that executes

  DESCRIPTION OF SYMBOLS 1 ... Electronic string instrument, 10 ... Main body, 11 ... Normal pick-up, 13 ... Electronic part, 14 ... Cable, 15 ... Display part, 16 ... Bridge, 161 ... Piece part, 162 ... opening, 17 ... tremolo arm, 20 ... neck, 21 ... fingerboard, 22 ... string, 23 ... fret, 24 ... neck PCB, 25 ... Elastic dielectric material, 26 ... Electrostatic pad, 30 ... Head, 31 ... Thread winding, 41 ... CPU, 42 ... ROM, 43 ... RAM, 44 ... Pressing string Sensor, 45 ... Sound source, 46 ... DSP, 47 ... D / A, 48 ... Switch, 49 ... I / F, 50 ... Bus, 51 ... X signal controller 52 ... Y signal controller, 53 ... external sound source

Claims (6)

A plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to a string to be pressed, and outputting a signal corresponding to the detected degree of proximity;
An operation position detecting means for detecting a position on the fingerboard of a sensor having the largest degree of proximity among the plurality of sensors as a string pressing operation position;
Vibration for extracting vibration signals of each of the plurality of stretched strings from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge side from the detected string pressing position. Signal extraction means;
A string detecting means for detecting whether any of the plurality of strings stretched is struck based on the extracted vibration signal;
A pitch determination means for determining a pitch of a musical tone to be generated from the detected operation state in response to detection of the string;
Sound generation instruction means for instructing the sound source to generate the musical tone having the determined pitch;
A musical sound generator. Pitch extraction means for extracting a vibration pitch from a vibration signal of the string detected by the string;
Musical sound control means for controlling the pitch of a musical sound that is generated by the sound source based on the extracted pitch;
The musical tone generator according to claim 1, further comprising:   The vibration signal extraction unit is configured to weight-average signals output from the plurality of sensors provided in the fingerboard on the bridge portion side from the detected string pressing position, and the plurality of tensioned signals. The musical tone generator according to claim 1 or 2, wherein the musical sound generator is extracted as a vibration signal of each string.   The vibration signal extraction means is stretched based on a signal of a maximum level among output signals of the plurality of sensors provided in the fingerboard on the bridge portion side from the detected string pressing position. The musical tone generator according to claim 1, wherein the musical tone generator is extracted as a vibration signal of each of the plurality of strings. A musical tone generator having a plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to each of the strings to be pressed, and outputting a signal corresponding to the detected degree of proximity A musical sound generation method used for
Detecting the position on the fingerboard of the sensor having the greatest degree of proximity among the plurality of sensors as a string pressing operation position;
Extracting a vibration signal of each of the plurality of strings stretched from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge portion side from the detected string pressing position,
Based on the extracted vibration signal, it is detected whether any of the plurality of stretched strings is struck,
In response to the detection of the string, the pitch of the musical sound to be generated is determined from the detected operation state,
A musical sound generating method for instructing a sound source to generate a musical sound having the determined pitch. A musical tone generator having a plurality of sensors provided on a fingerboard on which a plurality of strings are stretched, detecting a degree of proximity to each of the strings to be pressed, and outputting a signal corresponding to the detected degree of proximity As a computer used as
An operation position detection step of detecting a position on the fingerboard of a sensor having the greatest degree of proximity among the plurality of sensors as a string pressing operation position;
Vibration for extracting vibration signals of each of the plurality of stretched strings from at least a part of output signals of each of the plurality of sensors provided on the fingerboard on the bridge side from the detected string pressing position. A signal extraction step;
A string detection step for detecting whether one of the plurality of strings stretched is stringed based on the extracted vibration signal;
A pitch determination step for determining a pitch of a musical tone to be generated from the detected operation state in response to the detection of the string;
A sound generation instruction step for instructing a sound source to generate a sound of the determined pitch;
A program that executes

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